:root {
  --ink: #17201d;
  --muted: #637169;
  --subtle: #83918a;
  --line: #dce4df;
  --paper: #f7f9f7;
  --panel: #ffffff;
  --soft: #eef5f1;
  --deep: #153f3d;
  --deep-2: #0f2f33;
  --accent: #317c74;
  --accent-dark: #245f59;
  --gold: #a77422;
  --shadow: 0 24px 70px rgba(24, 48, 40, 0.1);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #ffffff 0, var(--paper) 520px),
    var(--paper);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(220, 228, 223, 0.82);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: 96px;
  height: 40px;
  object-fit: contain;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a,
.primary-link,
.secondary-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 14px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 820;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a:hover {
  color: var(--accent-dark);
  background: var(--soft);
}

.site-nav .nav-cta,
.primary-link {
  color: #fff;
  background: var(--accent-dark);
}

.primary-link:hover {
  background: #1d504b;
}

.secondary-link {
  border: 1px solid rgba(255, 255, 255, 0.46);
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 20px;
}

.hero {
  position: relative;
  min-height: min(760px, calc(100vh - 74px));
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(12, 34, 32, 0.84) 0%, rgba(12, 34, 32, 0.64) 44%, rgba(12, 34, 32, 0.2) 100%),
    linear-gradient(0deg, rgba(12, 34, 32, 0.52), transparent 45%);
}

.hero-content {
  position: relative;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 92px;
  color: #fff;
  display: block;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 880;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 840px;
  margin: 0;
  font-size: clamp(48px, 7vw, 94px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-text {
  max-width: 680px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 18px;
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.intro-band {
  position: relative;
  z-index: 3;
  width: min(1180px, calc(100% - 40px));
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin: -42px auto 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.intro-band div {
  min-height: 122px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.96);
}

.intro-band strong {
  font-size: 18px;
}

.intro-band span {
  color: var(--muted);
  line-height: 1.5;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0;
}

.operations-section {
  padding-bottom: 48px;
}

.section.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1fr);
  gap: 72px;
}

.section h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-head p:not(.section-label) {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.copy {
  display: grid;
  gap: 18px;
}

.copy p,
.tool-callout p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.operations-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.operations-grid article {
  min-height: 260px;
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 26px;
  background: #fff;
}

.operations-grid span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.operations-grid strong {
  font-size: 21px;
  line-height: 1.25;
}

.operations-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.service-grid,
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.service-grid article,
.strength-grid div {
  min-height: 224px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(24, 48, 40, 0.04);
}

.service-grid article {
  position: relative;
  overflow: hidden;
}

.service-grid article::after {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0.62;
}

.service-grid span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.service-grid h3,
.strength-grid strong {
  display: block;
  margin: 24px 0 10px;
  font-size: 20px;
}

.service-grid p,
.strength-grid p,
.process-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.platform-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.7fr);
  gap: 28px;
  align-items: stretch;
  padding-top: 28px;
}

.platform-copy {
  display: grid;
  align-content: center;
}

.platform-copy h2 {
  max-width: 760px;
}

.platform-copy > p {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.82;
}

.platform-groups {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.platform-groups div {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(24, 48, 40, 0.04);
}

.platform-groups strong {
  display: block;
  color: var(--accent-dark);
  font-size: 18px;
  margin-bottom: 9px;
}

.platform-groups p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.platform-visual {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border: 1px solid rgba(49, 124, 116, 0.24);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(36, 95, 89, 0.96), rgba(49, 124, 116, 0.86)),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.18), transparent 34%);
  box-shadow: var(--shadow);
}

.platform-visual::before,
.platform-visual::after {
  content: "";
  position: absolute;
  inset: 54px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
}

.platform-visual::after {
  inset: 104px;
  transform: rotate(-18deg);
}

.visual-core {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  width: 170px;
  height: 170px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 50%;
  color: #fff;
  background: rgba(15, 47, 51, 0.62);
  backdrop-filter: blur(12px);
}

.visual-core span {
  font-size: 32px;
  font-weight: 900;
  line-height: 1;
}

.visual-core strong {
  font-size: 14px;
}

.node {
  position: absolute;
  z-index: 2;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  padding: 0 12px;
  color: #fff;
  background: rgba(255, 255, 255, 0.13);
  font-size: 13px;
  font-weight: 850;
  backdrop-filter: blur(8px);
}

.n1 {
  left: 12%;
  top: 20%;
}

.n2 {
  right: 15%;
  top: 22%;
}

.n3 {
  left: 9%;
  top: 54%;
}

.n4 {
  right: 8%;
  top: 55%;
}

.n5 {
  left: 22%;
  bottom: 14%;
}

.n6 {
  right: 24%;
  bottom: 13%;
}

.process-section {
  width: 100%;
  padding-inline: max(20px, calc((100% - 1180px) / 2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.process-list li {
  position: relative;
  min-height: 188px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  counter-increment: step;
}

.process-list li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 22px;
  color: var(--accent);
  font-weight: 900;
}

.process-list strong {
  display: block;
  margin-bottom: 10px;
  font-size: 19px;
}

.muted {
  padding: 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eff5f2;
}

.strength-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.strength-grid div {
  min-height: 160px;
  background: rgba(255, 255, 255, 0.72);
}

.market-section {
  padding-top: 36px;
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.market-grid article {
  min-height: 156px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(24, 48, 40, 0.04);
}

.market-grid strong {
  color: var(--accent-dark);
  font-size: 20px;
}

.market-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.tool-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 42px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), #2f7f76);
  box-shadow: var(--shadow);
}

.tool-callout .section-label,
.tool-callout p {
  color: rgba(255, 255, 255, 0.78);
}

.tool-callout h2 {
  color: #fff;
}

.primary-link.dark {
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.14);
  white-space: nowrap;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1fr);
  gap: 56px;
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 7px;
}

.contact-form span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid #cbd8d1;
  border-radius: 8px;
  padding: 12px;
  color: var(--ink);
  background: #fbfdfb;
  font: inherit;
  outline: none;
}

.contact-form input {
  height: 44px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(49, 124, 116, 0.14);
}

.contact-form button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  color: #fff;
  background: var(--accent-dark);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

#formStatus {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
}

.site-footer a {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 980px) {
  .menu-button {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 20px 48px rgba(20, 60, 58, 0.14);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    justify-content: flex-start;
  }

  .hero {
    min-height: 680px;
  }

  .operations-grid,
  .service-grid,
  .platform-section,
  .process-list,
  .section.split,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .section.split,
  .contact-section {
    gap: 28px;
  }

  .platform-visual {
    min-height: 360px;
  }

  .service-grid,
  .operations-grid,
  .strength-grid,
  .market-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .muted {
    padding: 40px 24px;
  }

  .tool-callout {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 14px;
  }

  .brand img {
    width: 86px;
    height: 36px;
  }

  .hero {
    min-height: 720px;
  }

  .hero-content {
    width: min(100% - 28px, 1180px);
    padding-bottom: 64px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-text {
    font-size: 16px;
  }

  .intro-band,
  .section {
    width: min(100% - 28px, 1180px);
  }

  .intro-band {
    margin-top: -28px;
    grid-template-columns: 1fr;
  }

  .section {
    padding: 58px 0;
  }

  .service-grid,
  .operations-grid,
  .platform-section,
  .strength-grid,
  .market-grid {
    grid-template-columns: 1fr;
  }

  .platform-visual {
    min-height: 340px;
  }

  .service-grid article,
  .strength-grid div {
    min-height: 0;
  }

  .site-footer {
    flex-direction: column;
  }
}